A New Study Has Found That, on Average, 6- to 12-Year-Old

question 61

Multiple Choice

A new study has found that, on average, 6- to 12-year-old children are spending less time on household chores today compared to 1981 levels. Suppose two samples representative of study's results report the following summary statistics for the two periods. Using a 5% confidence level, which of the following is correct?

• A) Reject H₀: µ₁ − µ₂ ≤ 0 and therefore do not conclude that relative to the 1981 levels, 6- to 12-year-old children spent less time in 2008 on household chores.
• B) Do not reject H₀: µ₁ − µ₂ ≤ 0 and therefore conclude that relative to the 1981 levels, 6- to 12-year-old children spent less time in 2008 on household chores.
• C) Reject H₀: µ₁ − µ₂ ≤ 0 and therefore conclude that relative to the 1981 levels, 6- to 12-year-old children spent less time in 2008 on household chores.
• D) Do not reject H₀: µ₁ - µ₂ ≤ 0 and therefore do not conclude that relative to the 1981 levels, 6- to 12-year-old children spent less time in 2008 on household chores.

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Definitions:

Determinants

Factors or variables that significantly influence the outcome or dynamics of a particular system, market, or economic model.

Intangible Attributes

Characteristics of a product or service that cannot be physically touched or measured but influence consumer perception and value.

Tangible Elements

Physical or concrete components that can be seen, touched, and measured, as opposed to abstract or theoretical elements.

Inspection Point

A specific location or stage in the production or supply process where quality or compliance checks are performed.